Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 22
Book Description
High-temperature Mechanical Properties of a Tungsten-uranium Dioxide Composite
Author: Fuel-retention Properties of Tungsten-uranium Dioxide Composites
Author: Effect of Oxygen on Mechanical Properties of Tungsten
Author: Joseph R. StephensPublisher:
ISBN:
Category : Tungsten
Languages : en
Pages : 32
Book Description
The effect of oxygen on the mechanical properties of commercial polycrystalline tungsten and zone-refined single-crystal tungsten was evaluated by means of tensile tests of oxygen-doped specimens in the ductile-to-brittle transition temperature range. The effect of oxygen as a surface oxide that might be encountered in normal working and forming operations was evaluated by means of a three-point loading bend test at room temperature. Oxygen doping of the polycrystalline and single-crystal tensile specimens was accomplished by equilibrating the specimen and tungsten oxide powder in a sealed tungsten capsule at high temperatures. A desired oxygen concentration could be achieved by varying the time of doping in the temperature range of 3000 to 3600 F. Results showed that the commercial recrystallized rods containing 4 parts per million (ppm) oxygen had a ductile-to-brittle transition temperature (based on 50-percent reduction in area) of 4500 F. Increasing the oxygen concentration to 10, 30, and 50 ppm increased the transition temperature to 6600, 840, and 1020 F, respectively. The oxygen additions also produced a progressive lowering of the ultimate tensile strength. The mechanism for the effect of oxygen on the transition temperature and ultimate tensile strength is believed to be that of segregation of the oxygen atoms at the grain boundaries. The oxygen additions also caused a progressive lowering of the yield strength, which is believed to result from the interaction of oxygen with carbon atoms or other impurity atoms present in the tungsten lattice.
Properties of Tungsten of Interest in the Field of Nuclear Power
Author: Mechanical Properties of a Tungsten -- 23.4-percent-rhenium -- 0.27-percent-hafnium -- Carbon Alloy
Author: William D. KloppPublisher:
ISBN:
Category : Hafnium compounds
Languages : en
Pages : 28
Book Description
High Temperature Oxidation Protection of Tungsten
Author: Publisher:
ISBN:
Category : Metals at high temperatures
Languages : en
Pages : 140
Book Description
High-temperature Tensile Properties of Wrought Sintered Tungsten
Author: Paul F. SikoraPublisher:
ISBN:
Category : Aerospace engineering
Languages : en
Pages : 20
Book Description
High-temperature Tensile and Stress-rupture Properties of Some Alloys in the Tungsten-molybdenum System
Author: Paul F. SikoraPublisher:
ISBN:
Category : Molybdenum alloys
Languages : en
Pages : 24
Book Description
Elevated-temperature Tensile Properties of Alloyed Tungsten Fiber Composites
Author: Donald W. PetrasekPublisher:
ISBN:
Category : Metals
Languages : en
Pages : 36
Book Description
The effects of selected alloying elements on the elevated temperature tensile properties of tungsten fiber reinforced composites were studied. Composites were made of copper, copper- 2 percent chromium and copper- 10 percent nickel reinforced with various volume percents of uniaxially oriented tungsten fibers. The composites were tested in tension at temperatures up to 1800 degrees F.A comparison of the elevated-temperature tensile properties of tungsten fiber - copper alloy composites, representing soluble systems, was made with tungsten fiber - copper composites, representing a mutually insoluble system. The effects of alloying on the elevated-temperature tensile properties of tungsten fiber reinforced composites was also studied. A linear relation existed at elevated temperatures between tensile strength and volume percent fiber content for all the systems investigated. The copper alloy composites were weaker in tension at high volume percent fiber contents than copper composites in which alloying with the fiber did not occur. The tensile strength of the alloyed tungsten fiber decreased with increasing penetration of the alloying element into the tungsten fiber.
Tungsten
Author: Erik LassnerPublisher: Springer Science & Business Media
ISBN: 9780306450532
Category : Medical
Languages : en
Pages : 456
Book Description
This definitive work is the most uptodate compendium on tungsten in over twenty years. Wolf-Dieter Schubert's scientific career and extensive research activities combined with Erik Lassner's long-term industrial and development knowledge make this an essential resource on the current status of tungsten science and technology. Consolidating new knowledge previously presented at seminars or in the technical press, Tungsten is a significant contribution to the broader acceptance of the most recent innovations in the field. The text is enhanced by over 300 illustrations.